/*
 * OREKIT-X
 * Copyright 2002-2008 CS Communication & Systemes
 * 
 * Parts of this software package have been licensed to CS
 * Communication & Systemes (CS) under one or more contributor license
 * agreements.  See the NOTICE file distributed with this work for
 * additional information.
 *  
 * This is an experimental copy of OREKIT from www.orekit.org.
 * Please use the original OREKIT from orekit.org for normal work
 * unrelated to this research project.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You
 * may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
package ore;

import ore.errors.OrekitException;
import ore.time.AbsoluteDate;


/** 
 * Compute an attitude state at any date given a center of gravity,
 * position and velocity.
 * 
 * @author V&eacute;ronique Pommier-Maurussane
 */
public interface AttitudeLaw 
    extends java.io.Serializable
{

    /** 
     * Compute the attitude state at given date.
     * @param date date when attitude state shall be computed
     * @param pv satellite position/velocity at date, in given frame
     * @param frame frame in which satellite position/velocity are given
     * @return attitude state at date, from specified frame to satellite
     * frame
     * @throws OrekitException if some specific error occurs
     */
    public Attitude getState(AbsoluteDate date, PositionVelocity pv, Frame frame)
        throws OrekitException;

}
